Industrial Poly Aluminium Chloride (PAC)
Process Type
Industrial Raw Material Process
Main Applications
Poly aluminium chloride (PAC) is an effective and widely used coagulant (additive) in wastewater treatment. It rapidly binds suspended particles in water into larger flocs, accelerating settling and effectively reducing suspended solids (SS) and chemical oxygen demand (COD), so that effluent quickly meets environmental discharge standards.
Key Properties
- Chemical formula: Al2Cl6; appearance: clear, transparent, pale yellow
- Basicity >= 45
- Specific gravity (20 °C) > 1.192
- Aluminium oxide (Al2O3) >= 10%
- pH 2.0~3.0
- Arsenic (As) <2 ppm
- Iron (Fe) <10 ppm
- Lead (Pb) <2 ppm
- Mercury (Hg) <0.2 ppm
- Manganese (Mn) <3 ppm
- Chromium (Cr) <3 ppm
- Cadmium (Cd) <2 ppm
| Item | National standard Standard value | SGS test Result | Unit / Remarks |
|---|---|---|---|
| Aluminium oxide % | >9.0 | 10.4 | ppm |
| Specific gravity | >1.18 | 1.192 | In-house test |
| Copper (Cu) | <100 | 40.9 | ppm |
| Zinc (Zn) | <100 | 2.3 | ppm |
| Lead (Pb) | <20 | n.d. | ppm |
| Chromium (Cr) | <25 | 4.7 | ppm |
| Mercury (Hg) | <0.5 | n.d. | ppm |
| Arsenic (As) | <25 | n.d. | ppm |
| Nickel (Ni) | <100 | 2.94 | ppm |
| Cadmium (Cd) | <2.0 | n.d. | ppm |
Property determination in accordance with CNS 12537